A Survey on Fax Over IP Using T.38 Over SIP

Facsimile (fax) transmission is very important to the world of business. In a world where a significant percentage of long distance Public Switched Telephone Network (PSTN) traffic is composed of fax, great savings in toll charges are possible by utilizing IP networks instead. This paper is a brief survey on Real time Fax over IP and includes details on protocols like session initiation protocol which is responsible for session establishment and T.38 protocol which is mainly responsible for real time fax transmission between IP fax machines. It also deals with Session description protocol responsible for describing the multimedia session which is used in conjunction with session initiation protocol.